Asymmetric Gravitational Lenses in TeVeS and Application to the Bullet Cluster
arXiv:0707.0790 · doi:10.1051/0004-6361:20078224
Abstract
Aims: We explore the lensing properties of asymmetric matter density distributions in Bekenstein's Tensor-Vector-Scalar theory (TeVeS). Methods: Using an iterative Fourier-based solver for the resulting non-linear scalar field equation, we numerically calculate the total gravitational potential and derive the corresponding TeVeS lensing maps. Results: Considering variations on rather small scales, we show that the lensing properties significantly depend on the lens's extent along the line of sight. Furthermore, all simulated TeVeS convergence maps strongly track the dominant baryonic components, non-linear effects, being capable of counteracting this trend, turn out to be very small. Setting up a toy model for the cluster merger 1E0657-558, we infer that TeVeS cannot explain observations without assuming an additional dark mass component in both cluster centers, which is in accordance with previous work.
LaTex, 14 pages, 10 figures, references added, 2 figures removed, minor text changes to fit accepted version (A&A)
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- An analytic model for non-spherical lenses in covariant MOdified Newtonian Dynamics
- Gravitational Lenses in Generalized Einstein-Aether theory: the Bullet Cluster
- Mass of Galactic Lenses in Modified Newtonian Dynamics
- N-body simulations for testing the stability of triaxial galaxies in MOND
- Is Gravitational Lensing by Intercluster Filaments Always Negligible?
- Physics of galactic colliders: high speed satellites in LCDM vs MONDian cosmology
- Galaxy Bulges As Tests of CDM vs MOND in Strong Gravity